MN1381SG

Product Overview

• Category: Integrated Circuit
• Use: Voltage Regulator
• Characteristics: Low Dropout, Adjustable Output, High Efficiency
• Package: SOT-223
• Essence: Monolithic Linear Voltage Regulator
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 2.5V to 16V
• Output Voltage Range: 1.25V to 13.8V
• Output Current: Up to 1A
• Dropout Voltage: 0.6V (typical)
• Quiescent Current: 75µA (typical)
• Line Regulation: ±0.2% (typical)
• Load Regulation: ±0.4% (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The MN1381SG has a standard 3-pin configuration:

1. VIN - Input voltage pin
2. GND - Ground pin
3. VOUT - Output voltage pin

Functional Features

• Low dropout voltage ensures stable output even with small input-output differentials.
• Adjustable output voltage allows flexibility in various applications.
• High efficiency results in minimal power dissipation.
• Short-circuit protection safeguards the device from damage.

Advantages and Disadvantages

Advantages

• Wide input voltage range enables compatibility with various power sources.
• Adjustable output voltage suits different circuit requirements.
• Low quiescent current minimizes power consumption.
• Excellent line and load regulation ensures stable output under varying conditions.

Disadvantages

• Limited output current may not be suitable for high-power applications.
• Dropout voltage may affect performance in low-input voltage scenarios.

Working Principles

The MN1381SG is a monolithic linear voltage regulator that utilizes a pass transistor to regulate the output voltage. It operates by comparing the reference voltage with a fraction of the output voltage, adjusting the pass transistor accordingly to maintain a stable output. The low dropout voltage allows the device to operate efficiently even when the input voltage is close to the desired output voltage.

Detailed Application Field Plans

The MN1381SG is commonly used in various electronic devices and systems, including:

1. Battery-powered devices: Provides regulated voltage for portable electronics such as smartphones, tablets, and digital cameras.
2. Automotive applications: Ensures stable power supply for automotive electronics, including infotainment systems, navigation units, and lighting modules.
3. Industrial equipment: Used in control circuits, sensors, and actuators to maintain consistent voltage levels.
4. Communication systems: Regulates voltage in wireless routers, modems, and network switches to ensure reliable operation.

Detailed and Complete Alternative Models

• LM317: Adjustable Linear Voltage Regulator
• LT1084: Low Dropout Positive Fixed Voltage Regulator
• LM1117: Low Dropout Voltage Regulator with Fixed Output

These alternative models offer similar functionality and can be considered as substitutes for the MN1381SG in various applications.

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